Signedunsigned
Inscribedlabel on box lid: Sillimanite / 91-014 / Harvard / little mica present;
bottom of box: Sillimanite 91-014 Harvard
FunctionMinerology.
From Webster's 1913 unabridged: Fibrolite: (Fi"bro*lite) n. [L. fibra a fiber + -lite: cf. F. fibrolithe.] (Min.) A silicate of alumina, of fibrous or columnar structure. It is like andalusite in composition; — called also sillimanite, and bucholizite."
Related WorksWebster's Unabridged Dictionary, 1913 edition, s.v. "Fibrolite."